Microsoft has announced a closed beta for Sea of Thieves will be taking place on January 24. The beta will run its start date 4:00 AM PT on January 24 to 12:00 AM PT on January 29. The closed beta is available to players who preordered the game and anyone who joined the Sea of Thieves Insider Program before December 1, 2017. The beta will be available on both Windows 10 and Xbox One. Sea of Thieves will also be releasing on both those platforms on March 20.